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- W3189231036 abstract "ABSTRACT Telomeres, the short DNA sequences that protect chromosome ends, are an ancient molecular structure, which is highly conserved across most eukaryotes. Species differ in their telomere lengths, but the causes of this variation are not well understood. Here, we demonstrate that mean early-life telomere length is an evolutionary labile trait across 58 bird species (representing 35 families in 12 orders) with the greatest trait diversity found among passerines. Among these species, telomere length is significantly negatively associated with the fast-slow axis of life-history variation, suggesting that telomere length may have evolved to mediate trade-offs between physiological requirements underlying the diversity of pace-of-life strategies in birds. Curiously, within some species, larger individual chromosome size predicts longer telomere lengths on that chromosome, leading to the suggestion that telomere length also covaries with chromosome length across species. We show that longer mean chromosome length or genome size tends to be associated with longer mean early-life telomere length (measured across all chromosomes) within a phylogenetic framework constituting up to 32 bird species. Combined, our analyses generalize patterns previously found within a few species and provide potential adaptive explanations for the 10-fold variation in telomere lengths observed among birds." @default.
- W3189231036 created "2021-08-16" @default.
- W3189231036 creator A5016824246 @default.
- W3189231036 creator A5057095562 @default.
- W3189231036 creator A5087278865 @default.
- W3189231036 date "2021-08-09" @default.
- W3189231036 modified "2023-10-12" @default.
- W3189231036 title "Early-life telomere length covaries with life-history traits and scales with chromosome length in birds" @default.
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